Welcome to ecomodder.
There is a vast amount of information here. The search box in the upper right is your friend.
I'm curious why you settled on the Jetta. Better mileage than the Prius? Why do you need a manual transmission when a single-speed electric drivetrain is most efficient?
If your looking for a project, rather than going anywhere, there's
Robt. Q Riley. If you interest is the TDI into a kit there was
https://www.smythkitcars.com/6-8 years ago.
vw tdi kit car - TDIClub Forums
Why not get a New Beetle TDI and boat tail it?
Edit: If it's about ROI and commuting; then an $8K off-lease Nissan Leaf is the best bet. How much do you pay for a kilowatt of electricity?